Ответ:
1. Diana will try to be more active at the lessons, won't she ?
2. Vlad isn`t late , is he ?
3. Polina went shopping yesterday didn't she ?
4. Artyom isn`t sleeping, is he ?
5. Danya plays football well, doesn't she ?
6. Iliya and Vova often smile, don't they ?
7. Panteley and Kirill are doing this exercise, aren't they ?
8. Kostya and Egor have done their homework, haven't they ?
9.Kamil and Andrey don`t often get bad marks, do they ?
10.We can cope with any stress, can't they ?